257121030 has 16 divisors (see below), whose sum is σ = 617090544. Its totient is φ = 68565600.

The previous prime is 257121023. The next prime is 257121041. The reversal of 257121030 is 30121752.

It is a super-2 number, since 2×257121030² = 132222448136521800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257120988 and 257121006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4285321 + ... + 4285380.

It is an arithmetic number, because the mean of its divisors is an integer number (38568159).

Almost surely, 2^257121030 is an apocalyptic number.

257121030 is an abundant number, since it is smaller than the sum of its proper divisors (359969514).

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

257121030 is a wasteful number, since it uses less digits than its factorization.

257121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570711.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 257121030 is about 16034.9939195498. The cubic root of 257121030 is about 635.8859067123.

Adding to 257121030 its reverse (30121752), we get a palindrome (287242782).

The spelling of 257121030 in words is "two hundred fifty-seven million, one hundred twenty-one thousand, thirty".