1262411661 has 32 divisors (see below), whose sum is σ = 2030883840. Its totient is φ = 681398784.

The previous prime is 1262411609. The next prime is 1262411663. The reversal of 1262411661 is 1661142621.

It is not a de Polignac number, because 1262411661 - 2⁷ = 1262411533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262411663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136366 + ... + 145328.

It is an arithmetic number, because the mean of its divisors is an integer number (63465120).

Almost surely, 2^1262411661 is an apocalyptic number.

It is an amenable number.

1262411661 is a deficient number, since it is larger than the sum of its proper divisors (768472179).

1262411661 is a wasteful number, since it uses less digits than its factorization.

1262411661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9345.

The product of its digits is 3456, while the sum is 30.

The square root of 1262411661 is about 35530.4328850635. The cubic root of 1262411661 is about 1080.7709575803.

The spelling of 1262411661 in words is "one billion, two hundred sixty-two million, four hundred eleven thousand, six hundred sixty-one".