1011621402 has 24 divisors (see below), whose sum is σ = 2391105600. Its totient is φ = 306551880.

The previous prime is 1011621383. The next prime is 1011621407. The reversal of 1011621402 is 2041261101.

1011621402 is a `hidden beast` number, since 1 + 0 + 1 + 1 + 621 + 40 + 2 = 666.

It is a super-3 number, since 3×1011621402³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1011621407) 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, 2554402 + ... + 2554797.

It is an arithmetic number, because the mean of its divisors is an integer number (99629400).

Almost surely, 2^1011621402 is an apocalyptic number.

1011621402 is an abundant number, since it is smaller than the sum of its proper divisors (1379484198).

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

1011621402 is a wasteful number, since it uses less digits than its factorization.

1011621402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109218 (or 5109215 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1011621402 is about 31805.9963214486. The cubic root of 1011621402 is about 1003.8588904767.

Adding to 1011621402 its reverse (2041261101), we get a palindrome (3052882503).

The spelling of 1011621402 in words is "one billion, eleven million, six hundred twenty-one thousand, four hundred two".