1253406465 has 48 divisors (see below), whose sum is σ = 2206166976. Its totient is φ = 658224000.

The previous prime is 1253406463. The next prime is 1253406499. The reversal of 1253406465 is 5646043521.

1253406465 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 4 + 0 + 646 + 5 = 666.

It is not a de Polignac number, because 1253406465 - 2¹ = 1253406463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253406463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 958342 + ... + 959648.

It is an arithmetic number, because the mean of its divisors is an integer number (45961812).

Almost surely, 2^1253406465 is an apocalyptic number.

1253406465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253406465 is a deficient number, since it is larger than the sum of its proper divisors (952760511).

1253406465 is a wasteful number, since it uses less digits than its factorization.

1253406465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1253406465 is about 35403.4809729213. The cubic root of 1253406465 is about 1078.1949916501.

Adding to 1253406465 its reverse (5646043521), we get a palindrome (6899449986).

The spelling of 1253406465 in words is "one billion, two hundred fifty-three million, four hundred six thousand, four hundred sixty-five".