1258621142 has 16 divisors (see below), whose sum is σ = 2051404800. Its totient is φ = 576956520.

The previous prime is 1258621139. The next prime is 1258621153. The reversal of 1258621142 is 2411268521.

It is a junction number, because it is equal to n+sod(n) for n = 1258621099 and 1258621108.

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, 533042 + ... + 535397.

It is an arithmetic number, because the mean of its divisors is an integer number (128212800).

Almost surely, 2^1258621142 is an apocalyptic number.

1258621142 is a deficient number, since it is larger than the sum of its proper divisors (792783658).

1258621142 is a wasteful number, since it uses less digits than its factorization.

1258621142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068491.

The product of its digits is 7680, while the sum is 32.

The square root of 1258621142 is about 35477.0509202780. The cubic root of 1258621142 is about 1079.6881650004.

Adding to 1258621142 its reverse (2411268521), we get a palindrome (3669889663).

The spelling of 1258621142 in words is "one billion, two hundred fifty-eight million, six hundred twenty-one thousand, one hundred forty-two".