1257076081 has 8 divisors (see below), whose sum is σ = 1323565280. Its totient is φ = 1190619648.

The previous prime is 1257076069. The next prime is 1257076127. The reversal of 1257076081 is 1806707521.

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

It is not a de Polignac number, because 1257076081 - 2⁹ = 1257075569 is a prime.

It is a super-2 number, since 2×1257076081² = 3160480546844637122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257076081.

It is not an unprimeable number, because it can be changed into a prime (1257076481) 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, 134110 + ... + 143176.

It is an arithmetic number, because the mean of its divisors is an integer number (165445660).

Almost surely, 2^1257076081 is an apocalyptic number.

It is an amenable number.

1257076081 is a deficient number, since it is larger than the sum of its proper divisors (66489199).

1257076081 is an equidigital number, since it uses as much as digits as its factorization.

1257076081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16383.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 1257076081 is about 35455.2687339978. The cubic root of 1257076081 is about 1079.2461820776.

The spelling of 1257076081 in words is "one billion, two hundred fifty-seven million, seventy-six thousand, eighty-one".