154721340 has 60 divisors (see below), whose sum is σ = 485371656. Its totient is φ = 41258592.

The previous prime is 154721327. The next prime is 154721377. The reversal of 154721340 is 43127451.

154721340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

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 19 ways as a sum of consecutive naturals, for example, 46134 + ... + 49373.

Almost surely, 2^154721340 is an apocalyptic number.

154721340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154721340 is an abundant number, since it is smaller than the sum of its proper divisors (330650316).

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

154721340 is a wasteful number, since it uses less digits than its factorization.

154721340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95528 (or 95517 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 154721340 is about 12438.7033086251. The cubic root of 154721340 is about 536.8464340390.

Adding to 154721340 its reverse (43127451), we get a palindrome (197848791).

The spelling of 154721340 in words is "one hundred fifty-four million, seven hundred twenty-one thousand, three hundred forty".