1375621002 has 96 divisors (see below), whose sum is σ = 3652395840. Its totient is φ = 382384800.

The previous prime is 1375620959. The next prime is 1375621031. The reversal of 1375621002 is 2001265731.

It is a happy number.

1375621002 is a `hidden beast` number, since 1 + 37 + 5 + 621 + 0 + 0 + 2 = 666.

It is a super-2 number, since 2×1375621002² = 3784666282286968008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90877 + ... + 104927.

It is an arithmetic number, because the mean of its divisors is an integer number (38045790).

Almost surely, 2^1375621002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1375621002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826197920).

1375621002 is an abundant number, since it is smaller than the sum of its proper divisors (2276774838).

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

1375621002 is a wasteful number, since it uses less digits than its factorization.

1375621002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14113 (or 14100 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1375621002 is about 37089.3650794941. The cubic root of 1375621002 is about 1112.1574256747.

Adding to 1375621002 its reverse (2001265731), we get a palindrome (3376886733).

The spelling of 1375621002 in words is "one billion, three hundred seventy-five million, six hundred twenty-one thousand, two".