1400421225 has 72 divisors (see below), whose sum is σ = 2737973568. Its totient is φ = 629596800.

The previous prime is 1400421221. The next prime is 1400421241. The reversal of 1400421225 is 5221240041.

It is not a de Polignac number, because 1400421225 - 2² = 1400421221 is a prime.

It is a super-2 number, since 2×1400421225² = 3922359214861001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1400421221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 221052 + ... + 227298.

Almost surely, 2^1400421225 is an apocalyptic number.

1400421225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1400421225 is a deficient number, since it is larger than the sum of its proper divisors (1337552343).

1400421225 is a wasteful number, since it uses less digits than its factorization.

1400421225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335 (or 6323 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1400421225 is about 37422.2023002388. The cubic root of 1400421225 is about 1118.8011260095.

Adding to 1400421225 its reverse (5221240041), we get a palindrome (6621661266).

The spelling of 1400421225 in words is "one billion, four hundred million, four hundred twenty-one thousand, two hundred twenty-five".