1245760920 has 48 divisors (see below), whose sum is σ = 4048724160. Its totient is φ = 332202816.

The previous prime is 1245760913. The next prime is 1245760927. The reversal of 1245760920 is 290675421.

1245760920 is a `hidden beast` number, since 1 + 2 + 45 + 7 + 609 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1245760913) and next prime (1245760927).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245760927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1729864 + ... + 1730583.

It is an arithmetic number, because the mean of its divisors is an integer number (84348420).

Almost surely, 2^1245760920 is an apocalyptic number.

1245760920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245760920 is an abundant number, since it is smaller than the sum of its proper divisors (2802963240).

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

1245760920 is a wasteful number, since it uses less digits than its factorization.

1245760920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460464 (or 3460457 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1245760920 is about 35295.3385024142. The cubic root of 1245760920 is about 1075.9982564244.

The spelling of 1245760920 in words is "one billion, two hundred forty-five million, seven hundred sixty thousand, nine hundred twenty".