1249765401 has 8 divisors (see below), whose sum is σ = 1669274464. Its totient is φ = 831716640.

The previous prime is 1249765399. The next prime is 1249765409. The reversal of 1249765401 is 1045679421.

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

It is not a de Polignac number, because 1249765401 - 2¹ = 1249765399 is a prime.

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 1249765401.

It is not an unprimeable number, because it can be changed into a prime (1249765409) 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, 363076 + ... + 366501.

It is an arithmetic number, because the mean of its divisors is an integer number (208659308).

Almost surely, 2^1249765401 is an apocalyptic number.

It is an amenable number.

1249765401 is a deficient number, since it is larger than the sum of its proper divisors (419509063).

1249765401 is an equidigital number, since it uses as much as digits as its factorization.

1249765401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730151.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1249765401 is about 35352.0211727703. The cubic root of 1249765401 is about 1077.1499503697.

The spelling of 1249765401 in words is "one billion, two hundred forty-nine million, seven hundred sixty-five thousand, four hundred one".