1251430405100 has 36 divisors (see below), whose sum is σ = 2732900853984. Its totient is φ = 497383798080.

The previous prime is 1251430405091. The next prime is 1251430405109. The reversal of 1251430405100 is 15040341521.

It is an interprime number because it is at equal distance from previous prime (1251430405091) and next prime (1251430405109).

It is a self number, because there is not a number n which added to its sum of digits gives 1251430405100.

It is not an unprimeable number, because it can be changed into a prime (1251430405109) 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, 39838772 + ... + 39870171.

Almost surely, 2^{1251430405100} is an apocalyptic number.

1251430405100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251430405100 is an abundant number, since it is smaller than the sum of its proper divisors (1481470448884).

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

1251430405100 is a wasteful number, since it uses less digits than its factorization.

1251430405100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79709114 (or 79709107 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 1251430405100 its reverse (15040341521), we get a palindrome (1266470746621).

The spelling of 1251430405100 in words is "one trillion, two hundred fifty-one billion, four hundred thirty million, four hundred five thousand, one hundred".