147656421 has 18 divisors (see below), whose sum is σ = 234435110. Its totient is φ = 89488080.

The previous prime is 147656413. The next prime is 147656437. The reversal of 147656421 is 124656741.

147656421 is a `hidden beast` number, since 1 + 4 + 7 + 6 + 5 + 642 + 1 = 666.

147656421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 146676321 + 980100 = 12111^2 + 990^2 .

It is not a de Polignac number, because 147656421 - 2³ = 147656413 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147656461) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66706 + ... + 68883.

Almost surely, 2^147656421 is an apocalyptic number.

147656421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

147656421 is a deficient number, since it is larger than the sum of its proper divisors (86778689).

147656421 is a wasteful number, since it uses less digits than its factorization.

147656421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135617 (or 135603 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 147656421 is about 12151.3958457455. The cubic root of 147656421 is about 528.5476089409.

Adding to 147656421 its product of digits (40320), we get a palindrome (147696741).

The spelling of 147656421 in words is "one hundred forty-seven million, six hundred fifty-six thousand, four hundred twenty-one".