1261013424 has 40 divisors (see below), whose sum is σ = 3553766592. Its totient is φ = 382125120.

The previous prime is 1261013363. The next prime is 1261013459. The reversal of 1261013424 is 4243101621.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1261013394 and 1261013403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193614 + ... + 1194669.

Almost surely, 2^1261013424 is an apocalyptic number.

It is an amenable number.

1261013424 is an abundant number, since it is smaller than the sum of its proper divisors (2292753168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261013424 is a wasteful number, since it uses less digits than its factorization.

1261013424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388305 (or 2388299 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1261013424 is about 35510.7508228142. The cubic root of 1261013424 is about 1080.3717924339.

The spelling of 1261013424 in words is "one billion, two hundred sixty-one million, thirteen thousand, four hundred twenty-four".