1262540231 has 2 divisors, whose sum is σ = 1262540232. Its totient is φ = 1262540230.

The previous prime is 1262540171. The next prime is 1262540261. The reversal of 1262540231 is 1320452621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1262540231 is a prime.

It is a super-2 number, since 2×1262540231² = 3188015669787066722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1262540231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1262540261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631270115 + 631270116.

It is an arithmetic number, because the mean of its divisors is an integer number (631270116).

Almost surely, 2^1262540231 is an apocalyptic number.

1262540231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262540231 is an equidigital number, since it uses as much as digits as its factorization.

1262540231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1262540231 is about 35532.2421330262. The cubic root of 1262540231 is about 1080.8076466174.

Adding to 1262540231 its reverse (1320452621), we get a palindrome (2582992852).

The spelling of 1262540231 in words is "one billion, two hundred sixty-two million, five hundred forty thousand, two hundred thirty-one".