1251421054 has 32 divisors (see below), whose sum is σ = 2168117280. Its totient is φ = 536844672.

The previous prime is 1251421049. The next prime is 1251421091. The reversal of 1251421054 is 4501241521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2284 + ... + 50080.

It is an arithmetic number, because the mean of its divisors is an integer number (67753665).

Almost surely, 2^1251421054 is an apocalyptic number.

1251421054 is a deficient number, since it is larger than the sum of its proper divisors (916696226).

1251421054 is a wasteful number, since it uses less digits than its factorization.

1251421054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47884.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1251421054 is about 35375.4300892583. The cubic root of 1251421054 is about 1077.6253994949.

Adding to 1251421054 its reverse (4501241521), we get a palindrome (5752662575).

The spelling of 1251421054 in words is "one billion, two hundred fifty-one million, four hundred twenty-one thousand, fifty-four".