1257075442 has 32 divisors (see below), whose sum is σ = 2296553472. Its totient is φ = 504352464.

The previous prime is 1257075437. The next prime is 1257075461. The reversal of 1257075442 is 2445707521.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26398 + ... + 56665.

It is an arithmetic number, because the mean of its divisors is an integer number (71767296).

Almost surely, 2^1257075442 is an apocalyptic number.

1257075442 is a deficient number, since it is larger than the sum of its proper divisors (1039478030).

1257075442 is a wasteful number, since it uses less digits than its factorization.

1257075442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83142.

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 1257075442 is about 35455.2597226420. The cubic root of 1257075442 is about 1079.2459992092.

The spelling of 1257075442 in words is "one billion, two hundred fifty-seven million, seventy-five thousand, four hundred forty-two".