1374900021 has 32 divisors (see below), whose sum is σ = 2339020800. Its totient is φ = 789413040.

The previous prime is 1374900011. The next prime is 1374900029. The reversal of 1374900021 is 1200094731.

It is not a de Polignac number, because 1374900021 - 2⁹ = 1374899509 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1374900029) 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, 116181 + ... + 127466.

It is an arithmetic number, because the mean of its divisors is an integer number (73094400).

Almost surely, 2^1374900021 is an apocalyptic number.

1374900021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1374900021 is a deficient number, since it is larger than the sum of its proper divisors (964120779).

1374900021 is a wasteful number, since it uses less digits than its factorization.

1374900021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243686 (or 243680 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1374900021 is about 37079.6442944104. The cubic root of 1374900021 is about 1111.9630929580.

Adding to 1374900021 its reverse (1200094731), we get a palindrome (2574994752).

The spelling of 1374900021 in words is "one billion, three hundred seventy-four million, nine hundred thousand, twenty-one".