1257426102 has 16 divisors (see below), whose sum is σ = 2518057152. Its totient is φ = 418607880.

The previous prime is 1257426101. The next prime is 1257426119. The reversal of 1257426102 is 2016247521.

It is a super-2 number, since 2×1257426102² = 3162240803981828808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1257426102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257426101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128424 + ... + 137867.

It is an arithmetic number, because the mean of its divisors is an integer number (157378572).

Almost surely, 2^1257426102 is an apocalyptic number.

1257426102 is an abundant number, since it is smaller than the sum of its proper divisors (1260631050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257426102 is a wasteful number, since it uses less digits than its factorization.

1257426102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267083.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1257426102 is about 35460.2044833360. The cubic root of 1257426102 is about 1079.3463414283.

The spelling of 1257426102 in words is "one billion, two hundred fifty-seven million, four hundred twenty-six thousand, one hundred two".