1421641042 has 4 divisors (see below), whose sum is σ = 2132461566. Its totient is φ = 710820520.

The previous prime is 1421640967. The next prime is 1421641043. The reversal of 1421641042 is 2401461241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 979001521 + 442639521 = 31289^2 + 21039^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1421640998 and 1421641016.

It is not an unprimeable number, because it can be changed into a prime (1421641043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355410259 + ... + 355410262.

Almost surely, 2^1421641042 is an apocalyptic number.

1421641042 is a deficient number, since it is larger than the sum of its proper divisors (710820524).

1421641042 is an equidigital number, since it uses as much as digits as its factorization.

1421641042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710820523.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1421641042 is about 37704.6554420008. The cubic root of 1421641042 is about 1124.4236829536.

The spelling of 1421641042 in words is "one billion, four hundred twenty-one million, six hundred forty-one thousand, forty-two".