1390251265 has 16 divisors (see below), whose sum is σ = 1854590976. Its totient is φ = 993528000.

The previous prime is 1390251263. The next prime is 1390251277. The reversal of 1390251265 is 5621520931.

It is not a de Polignac number, because 1390251265 - 2¹ = 1390251263 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 1390251265.

It is not an unprimeable number, because it can be changed into a prime (1390251263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342961 + ... + 346990.

It is an arithmetic number, because the mean of its divisors is an integer number (115911936).

Almost surely, 2^1390251265 is an apocalyptic number.

It is an amenable number.

1390251265 is a deficient number, since it is larger than the sum of its proper divisors (464339711).

1390251265 is a wasteful number, since it uses less digits than its factorization.

1390251265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690000.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1390251265 is about 37286.0733384464. The cubic root of 1390251265 is about 1116.0862720376.

The spelling of 1390251265 in words is "one billion, three hundred ninety million, two hundred fifty-one thousand, two hundred sixty-five".