1275977090 has 32 divisors (see below), whose sum is σ = 2380235760. Its totient is φ = 491904000.

The previous prime is 1275977089. The next prime is 1275977093. The reversal of 1275977090 is 907795721.

It can be written as a sum of positive squares in 8 ways, for example, as 325549849 + 950427241 = 18043^2 + 30829^2 .

It is not an unprimeable number, because it can be changed into a prime (1275977093) 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, 170630 + ... + 177950.

Almost surely, 2^1275977090 is an apocalyptic number.

1275977090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1275977090 is a deficient number, since it is larger than the sum of its proper divisors (1104258670).

1275977090 is a wasteful number, since it uses less digits than its factorization.

1275977090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958.

The product of its (nonzero) digits is 277830, while the sum is 47.

The square root of 1275977090 is about 35720.8215191084. The cubic root of 1275977090 is about 1084.6283677013.

The spelling of 1275977090 in words is "one billion, two hundred seventy-five million, nine hundred seventy-seven thousand, ninety".