158421400 has 24 divisors (see below), whose sum is σ = 368330220. Its totient is φ = 63368480.

The previous prime is 158421391. The next prime is 158421409. The reversal of 158421400 is 4124851.

It is an interprime number because it is at equal distance from previous prime (158421391) and next prime (158421409).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158421409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395854 + ... + 396253.

Almost surely, 2^158421400 is an apocalyptic number.

158421400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158421400 is an abundant number, since it is smaller than the sum of its proper divisors (209908820).

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

158421400 is a wasteful number, since it uses less digits than its factorization.

158421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792123 (or 792114 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 158421400 is about 12586.5563201378. The cubic root of 158421400 is about 541.0922109727.

The spelling of 158421400 in words is "one hundred fifty-eight million, four hundred twenty-one thousand, four hundred".