1261153310 has 16 divisors (see below), whose sum is σ = 2389554000. Its totient is φ = 477910656.

The previous prime is 1261153301. The next prime is 1261153349. The reversal of 1261153310 is 133511621.

It is a super-2 number, since 2×1261153310² = 3181015342647912200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3318635 + ... + 3319014.

It is an arithmetic number, because the mean of its divisors is an integer number (149347125).

Almost surely, 2^1261153310 is an apocalyptic number.

1261153310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261153310 is a deficient number, since it is larger than the sum of its proper divisors (1128400690).

1261153310 is a wasteful number, since it uses less digits than its factorization.

1261153310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637675.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1261153310 is about 35512.7203970634. The cubic root of 1261153310 is about 1080.4117400130.

Adding to 1261153310 its reverse (133511621), we get a palindrome (1394664931).

The spelling of 1261153310 in words is "one billion, two hundred sixty-one million, one hundred fifty-three thousand, three hundred ten".