1257691054 has 32 divisors (see below), whose sum is σ = 2013310080. Its totient is φ = 587557152.

The previous prime is 1257691027. The next prime is 1257691067. The reversal of 1257691054 is 4501967521.

It is a junction number, because it is equal to n+sod(n) for n = 1257690998 and 1257691016.

It is a congruent number.

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, 1150132 + ... + 1151224.

It is an arithmetic number, because the mean of its divisors is an integer number (62915940).

Almost surely, 2^1257691054 is an apocalyptic number.

1257691054 is a deficient number, since it is larger than the sum of its proper divisors (755619026).

1257691054 is a wasteful number, since it uses less digits than its factorization.

1257691054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1257691054 is about 35463.9401928212. The cubic root of 1257691054 is about 1079.4221457209.

The spelling of 1257691054 in words is "one billion, two hundred fifty-seven million, six hundred ninety-one thousand, fifty-four".