1260641550 has 48 divisors (see below), whose sum is σ = 3573021312. Its totient is φ = 288146400.

The previous prime is 1260641539. The next prime is 1260641561. The reversal of 1260641550 is 551460621.

It is an interprime number because it is at equal distance from previous prime (1260641539) and next prime (1260641561).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 599256 + ... + 601355.

It is an arithmetic number, because the mean of its divisors is an integer number (74437944).

Almost surely, 2^1260641550 is an apocalyptic number.

1260641550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1260641550 is an abundant number, since it is smaller than the sum of its proper divisors (2312379762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1260641550 is a wasteful number, since it uses less digits than its factorization.

1260641550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200633 (or 1200628 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1260641550 is about 35505.5143604483. The cubic root of 1260641550 is about 1080.2655811195.

The spelling of 1260641550 in words is "one billion, two hundred sixty million, six hundred forty-one thousand, five hundred fifty".