1257274042 has 16 divisors (see below), whose sum is σ = 1985898240. Its totient is φ = 595332288.

The previous prime is 1257273991. The next prime is 1257274087. The reversal of 1257274042 is 2404727521.

It is a junction number, because it is equal to n+sod(n) for n = 1257273989 and 1257274007.

It is an unprimeable number.

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, 152818 + ... + 160834.

It is an arithmetic number, because the mean of its divisors is an integer number (124118640).

Almost surely, 2^1257274042 is an apocalyptic number.

1257274042 is a deficient number, since it is larger than the sum of its proper divisors (728624198).

1257274042 is a wasteful number, since it uses less digits than its factorization.

1257274042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12165.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 1257274042 is about 35458.0603248401. The cubic root of 1257274042 is about 1079.3028313775.

The spelling of 1257274042 in words is "one billion, two hundred fifty-seven million, two hundred seventy-four thousand, forty-two".