1257297233 has 8 divisors (see below), whose sum is σ = 1312588200. Its totient is φ = 1202802048.

The previous prime is 1257297191. The next prime is 1257297247. The reversal of 1257297233 is 3327927521.

It can be written as a sum of positive squares in 4 ways, for example, as 635443264 + 621853969 = 25208^2 + 24937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1257297233 - 2¹⁶ = 1257231697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257297733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195716 + ... + 202037.

It is an arithmetic number, because the mean of its divisors is an integer number (164073525).

Almost surely, 2^1257297233 is an apocalyptic number.

It is an amenable number.

1257297233 is a deficient number, since it is larger than the sum of its proper divisors (55290967).

1257297233 is a wasteful number, since it uses less digits than its factorization.

1257297233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397891.

The product of its digits is 158760, while the sum is 41.

The square root of 1257297233 is about 35458.3873434763. The cubic root of 1257297233 is about 1079.3094674163.

The spelling of 1257297233 in words is "one billion, two hundred fifty-seven million, two hundred ninety-seven thousand, two hundred thirty-three".