1425655021 has 8 divisors (see below), whose sum is σ = 1636082624. Its totient is φ = 1216918080.

The previous prime is 1425654991. The next prime is 1425655027. The reversal of 1425655021 is 1205565241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1425655021 - 2¹⁷ = 1425523949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425655027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420855 + ... + 424228.

It is an arithmetic number, because the mean of its divisors is an integer number (204510328).

Almost surely, 2^1425655021 is an apocalyptic number.

It is an amenable number.

1425655021 is a deficient number, since it is larger than the sum of its proper divisors (210427603).

1425655021 is an equidigital number, since it uses as much as digits as its factorization.

1425655021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845331.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1425655021 is about 37757.8471446665. The cubic root of 1425655021 is about 1125.4809521516.

The spelling of 1425655021 in words is "one billion, four hundred twenty-five million, six hundred fifty-five thousand, twenty-one".