1257423524 has 48 divisors (see below), whose sum is σ = 2680086528. Its totient is φ = 504486048.

The previous prime is 1257423511. The next prime is 1257423529. The reversal of 1257423524 is 4253247521.

It is a super-2 number, since 2×1257423524² = 3162227837417157152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1257423529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9497 + ... + 51039.

It is an arithmetic number, because the mean of its divisors is an integer number (55835136).

Almost surely, 2^1257423524 is an apocalyptic number.

1257423524 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257423524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340043264).

1257423524 is an abundant number, since it is smaller than the sum of its proper divisors (1422663004).

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

1257423524 is a wasteful number, since it uses less digits than its factorization.

1257423524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41624 (or 41622 counting only the distinct ones).

The product of its digits is 67200, while the sum is 35.

The square root of 1257423524 is about 35460.1681327091. The cubic root of 1257423524 is about 1079.3456037954.

The spelling of 1257423524 in words is "one billion, two hundred fifty-seven million, four hundred twenty-three thousand, five hundred twenty-four".