1258442940 has 24 divisors (see below), whose sum is σ = 3523640400. Its totient is φ = 335584768.

The previous prime is 1258442893. The next prime is 1258442951. The reversal of 1258442940 is 492448521.

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, 10486965 + ... + 10487084.

It is an arithmetic number, because the mean of its divisors is an integer number (146818350).

Almost surely, 2^1258442940 is an apocalyptic number.

1258442940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258442940 is an abundant number, since it is smaller than the sum of its proper divisors (2265197460).

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

1258442940 is a wasteful number, since it uses less digits than its factorization.

1258442940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20974061 (or 20974059 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 1258442940 is about 35474.5393204760. The cubic root of 1258442940 is about 1079.6372066764.

The spelling of 1258442940 in words is "one billion, two hundred fifty-eight million, four hundred forty-two thousand, nine hundred forty".