257121470 has 8 divisors (see below), whose sum is σ = 462818664. Its totient is φ = 102848584.

The previous prime is 257121461. The next prime is 257121499. The reversal of 257121470 is 74121752.

257121470 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×257121470² = 132222900669921800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12856064 + ... + 12856083.

It is an arithmetic number, because the mean of its divisors is an integer number (57852333).

Almost surely, 2^257121470 is an apocalyptic number.

257121470 is a deficient number, since it is larger than the sum of its proper divisors (205697194).

257121470 is a wasteful number, since it uses less digits than its factorization.

257121470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712154.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 257121470 is about 16035.0076395367. The cubic root of 257121470 is about 635.8862694334.

The spelling of 257121470 in words is "two hundred fifty-seven million, one hundred twenty-one thousand, four hundred seventy".