1400021502 has 64 divisors (see below), whose sum is σ = 3289248000. Its totient is φ = 392506880.

The previous prime is 1400021449. The next prime is 1400021509. The reversal of 1400021502 is 2051200041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400021509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55624 + ... + 76772.

It is an arithmetic number, because the mean of its divisors is an integer number (51394500).

Almost surely, 2^1400021502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400021502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644624000).

1400021502 is an abundant number, since it is smaller than the sum of its proper divisors (1889226498).

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

1400021502 is a wasteful number, since it uses less digits than its factorization.

1400021502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1400021502 is about 37416.8611991973. The cubic root of 1400021502 is about 1118.6946692068.

Adding to 1400021502 its reverse (2051200041), we get a palindrome (3451221543).

The spelling of 1400021502 in words is "one billion, four hundred million, twenty-one thousand, five hundred two".