1290704261 has 16 divisors (see below), whose sum is σ = 1610302848. Its totient is φ = 1005048000.

The previous prime is 1290704221. The next prime is 1290704267. The reversal of 1290704261 is 1624070921.

It is a happy number.

It is not a de Polignac number, because 1290704261 - 2⁶ = 1290704197 is a prime.

It is a super-2 number, since 2×1290704261² = 3331834978727112242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290704267) 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, 125411 + ... + 135311.

It is an arithmetic number, because the mean of its divisors is an integer number (100643928).

Almost surely, 2^1290704261 is an apocalyptic number.

1290704261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1290704261 is a deficient number, since it is larger than the sum of its proper divisors (319598587).

1290704261 is a wasteful number, since it uses less digits than its factorization.

1290704261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1290704261 is about 35926.3727782252. The cubic root of 1290704261 is about 1088.7852980683.

It can be divided in two parts, 129070 and 4261, that added together give a palindrome (133331).

The spelling of 1290704261 in words is "one billion, two hundred ninety million, seven hundred four thousand, two hundred sixty-one".