1002551421 has 8 divisors (see below), whose sum is σ = 1415366784. Its totient is φ = 629051840.

The previous prime is 1002551419. The next prime is 1002551437. The reversal of 1002551421 is 1241552001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002551421 - 2¹ = 1002551419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002551411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9828885 + ... + 9828986.

It is an arithmetic number, because the mean of its divisors is an integer number (176920848).

Almost surely, 2^1002551421 is an apocalyptic number.

It is an amenable number.

1002551421 is a deficient number, since it is larger than the sum of its proper divisors (412815363).

1002551421 is a wasteful number, since it uses less digits than its factorization.

1002551421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19657891.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1002551421 is about 31663.0924105653. The cubic root of 1002551421 is about 1000.8497513847.

The spelling of 1002551421 in words is "one billion, two million, five hundred fifty-one thousand, four hundred twenty-one".