1254887401621 has 16 divisors (see below), whose sum is σ = 1440634947840. Its totient is φ = 1070760741120.

The previous prime is 1254887401567. The next prime is 1254887401633. The reversal of 1254887401621 is 1261047884521.

It is not a de Polignac number, because 1254887401621 - 2¹¹ = 1254887399573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254887401661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11369661 + ... + 11479501.

It is an arithmetic number, because the mean of its divisors is an integer number (90039684240).

Almost surely, 2^{1254887401621} is an apocalyptic number.

It is an amenable number.

1254887401621 is a deficient number, since it is larger than the sum of its proper divisors (185747546219).

1254887401621 is a wasteful number, since it uses less digits than its factorization.

1254887401621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117204.

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 1254887401621 in words is "one trillion, two hundred fifty-four billion, eight hundred eighty-seven million, four hundred one thousand, six hundred twenty-one".