1401156252 has 48 divisors (see below), whose sum is σ = 3846316320. Its totient is φ = 439577856.

The previous prime is 1401156221. The next prime is 1401156307. The reversal of 1401156252 is 2526511041.

1401156252 is a `hidden beast` number, since 1 + 40 + 11 + 562 + 52 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379743 + ... + 383414.

It is an arithmetic number, because the mean of its divisors is an integer number (80131590).

Almost surely, 2^1401156252 is an apocalyptic number.

1401156252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1401156252 is an abundant number, since it is smaller than the sum of its proper divisors (2445160068).

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

1401156252 is a wasteful number, since it uses less digits than its factorization.

1401156252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763187 (or 763179 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1401156252 is about 37432.0217460933. The cubic root of 1401156252 is about 1118.9968302708.

Adding to 1401156252 its reverse (2526511041), we get a palindrome (3927667293).

The spelling of 1401156252 in words is "one billion, four hundred one million, one hundred fifty-six thousand, two hundred fifty-two".