1642211253 has 24 divisors (see below), whose sum is σ = 2519951616. Its totient is φ = 1068098400.

The previous prime is 1642211243. The next prime is 1642211257. The reversal of 1642211253 is 3521122461.

1642211253 is a `hidden beast` number, since 1 + 642 + 2 + 1 + 12 + 5 + 3 = 666.

It is not a de Polignac number, because 1642211253 - 2¹³ = 1642203061 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 (1642211257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72453 + ... + 92378.

It is an arithmetic number, because the mean of its divisors is an integer number (104997984).

Almost surely, 2^1642211253 is an apocalyptic number.

It is an amenable number.

1642211253 is a deficient number, since it is larger than the sum of its proper divisors (877740363).

1642211253 is an equidigital number, since it uses as much as digits as its factorization.

1642211253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164887 (or 164875 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1642211253 is about 40524.2057664305. The cubic root of 1642211253 is about 1179.8034847024.

The spelling of 1642211253 in words is "one billion, six hundred forty-two million, two hundred eleven thousand, two hundred fifty-three".