1258940542 has 16 divisors (see below), whose sum is σ = 2003218992. Its totient is φ = 591338880.

The previous prime is 1258940531. The next prime is 1258940563. The reversal of 1258940542 is 2450498521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1258940495 and 1258940504.

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, 15828 + ... + 52615.

It is an arithmetic number, because the mean of its divisors is an integer number (125201187).

Almost surely, 2^1258940542 is an apocalyptic number.

1258940542 is a deficient number, since it is larger than the sum of its proper divisors (744278450).

1258940542 is a wasteful number, since it uses less digits than its factorization.

1258940542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69003.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 1258940542 is about 35481.5521362863. The cubic root of 1258940542 is about 1079.7794880155.

The spelling of 1258940542 in words is "one billion, two hundred fifty-eight million, nine hundred forty thousand, five hundred forty-two".