1249291092 has 48 divisors (see below), whose sum is σ = 3476293632. Its totient is φ = 341420640.

The previous prime is 1249291091. The next prime is 1249291117. The reversal of 1249291092 is 2901929421.

It is a self number, because there is not a number n which added to its sum of digits gives 1249291092.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249291091) 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, 321384 + ... + 325247.

It is an arithmetic number, because the mean of its divisors is an integer number (72422784).

Almost surely, 2^1249291092 is an apocalyptic number.

1249291092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1249291092 is an abundant number, since it is smaller than the sum of its proper divisors (2227002540).

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

1249291092 is a wasteful number, since it uses less digits than its factorization.

1249291092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646668 (or 646666 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1249291092 is about 35345.3121644158. The cubic root of 1249291092 is about 1077.0136670424.

The spelling of 1249291092 in words is "one billion, two hundred forty-nine million, two hundred ninety-one thousand, ninety-two".